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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright 2018-2022 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __KFD_IOMMU_H__
#define __KFD_IOMMU_H__
#include <linux/kconfig.h>
#if IS_REACHABLE(CONFIG_AMD_IOMMU_V2)
#define KFD_SUPPORT_IOMMU_V2
int kfd_iommu_check_device(struct kfd_dev *kfd);
int kfd_iommu_device_init(struct kfd_dev *kfd);
int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd);
void kfd_iommu_unbind_process(struct kfd_process *p);
void kfd_iommu_suspend(struct kfd_dev *kfd);
int kfd_iommu_resume(struct kfd_dev *kfd);
int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev);
#else
static inline int kfd_iommu_check_device(struct kfd_dev *kfd)
{
return -ENODEV;
}
static inline int kfd_iommu_device_init(struct kfd_dev *kfd)
{
#if IS_MODULE(CONFIG_AMD_IOMMU_V2)
WARN_ONCE(1, "iommu_v2 module is not usable by built-in KFD");
#endif
return 0;
}
static inline int kfd_iommu_bind_process_to_device(
struct kfd_process_device *pdd)
{
return 0;
}
static inline void kfd_iommu_unbind_process(struct kfd_process *p)
{
/* empty */
}
static inline void kfd_iommu_suspend(struct kfd_dev *kfd)
{
/* empty */
}
static inline int kfd_iommu_resume(struct kfd_dev *kfd)
{
return 0;
}
static inline int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev)
{
return 0;
}
#endif /* IS_REACHABLE(CONFIG_AMD_IOMMU_V2) */
#endif /* __KFD_IOMMU_H__ */
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